Since day one, we’ve been on the leading edge of the industry. Our first breakthrough came in 1972 – AMSOIL 10W-40 Synthetic Motor Oil, the result of years of research and inspired by aerospace technology, became the first full synthetic motor oil in the world to meet American Petroleum Institute service requirements. We’ve since remained steadfast in our pursuit of developing products that help you get the most out of your vehicles.
Whether hauling heavy tools and equipment to a job site or towing a boat for a relaxing weekend on the lake, many vehicles are subjected to extreme operating conditions and hot temperatures in the summer, placing an increased level of stress on drivetrain components.
New vehicles such as turbo-diesel trucks and vehicles with V-10 engines boast more horsepower and torque than their predecessors, but differential designs have remained virtually unchanged. Differentials today are subjected to severe-duty service and encounter more stress and heat than was seen only a few years ago. Modern gear oils are faced with the challenge of providing adequate wear protection during severe service operating conditions, while also providing maximum fuel efficiency.